CSS定位问题（2）：float 和 display 的使用_html/css_WEB-ITnose
display 属性规定元素应该生成的框的类型。
这个属性用于定义建立布局时元素生成的显示框类型。对于 HTML 等文档类型，如果使用 display 不谨慎会很危险，因为可能违反 HTML 中已经定义的显示层次结构。对于 XML，由于 XML 没有内置的这种层次结构，所有 display 是绝对必要的。
浏览器支持:所有主流浏览器都支持 display 属性。
注释：任何版本的 Internet Explorer （包括 IE8）都不支持"inherit"、"inline-table"、"run-in"、"table"、"table-caption"、"table-cell"、"table-column"、"table-column-group"、"table-row"、以及 "table-row-group"属性值。
因为对块级元素设置display：inline-block的时候可以达到与float相同的效果。就是使块级元素末尾没有换行符。那么到底什么时候使用float和什么时候使用display：inline-block呢？
大多数时候float的出现是为了处理文字环绕。所以当我们为了实现文字环绕的时候使用float而处理非文字环绕的情况下，则以使用display：inline-block为主。
1.1float实现的导航条
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>floatNav</title> <style type="text/css"> body, ul{margin:0;padding:0;} #body-div{ background-color:#eaebea; height:40px; /*设置当浏览器窗口变短时li换行显示*/ overflow:hidden; /*这里主要是让父级div跟据内容自动伸长*/ float:left; } ul li { list-style:none; float:left; border-right:1px solid #d2d5d2; line-height:40px; padding: 0 10px; } ul li a{ text-decoration:none; } a:link, a:visited{color:#3f3b3c;} a:hover{color:#fd687f;} </style></head><body> <div id="body-div"> <ul> <li><a href="">首页</a></li> <li><a href="">内容1</a></li> <li><a href="">内容2</a></li> <li><a href="">内容3</a></li> <li><a href="">内容4</a></li> <li><a href="">内容5</a></li> <li><a href="">内容6</a></li> <li><a href="">内容6</a></li> </ul> </div></body></html>在chrome和firefox还有IE中，显示效果如下：
1.2display：inline-block实现的导航条
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>inlineNav</title> <style type="text/css"> body, ul{margin:0;padding:0;} #body-div{ background-color:#eaebea; height:40px; /*这里主要是让父级div跟据内容自动伸长*/ display:inline-block; /*设置当浏览器窗口变短时li换行显示*/ overflow:hidden; margin:0 auto; } ul li { list-style:none; display:inline-block; border-right:1px solid #d2d5d2; line-height:40px; padding:0 10px; } ul li a{ text-decoration:none; } a:link, a:visited{color:#3f3b3c;} a:hover{color:#fd687f;} </style></head><body> <div id="body-div"> <ul> <li><a href="http://www.baidu.com" target="_blank">首页</a></li> <li><a href="">内容1</a></li> <li><a href="">内容2</a></li> <li><a href="">内容3</a></li> <li><a href="">内容4</a></li> <li><a href="">内容5</a></li> <li><a href="">内容6</a></li> <li><a href="">内容7</a></li> </ul> </div></body></html>这段代码在chrome和firefox,IE(>=8)中的效果如下：
在IE(
因为IE(
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